Warm Forming of Aluminum Alloys using a Coupled Thermo-Mechanical Anisotropic Material Model
- Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824-1226 (United States)
- General Motors Research and Development Center, Warren, MI 48090 (United States)
Temperature-dependant anisotropic material models for two types of automotive aluminum alloys (5754-O and 5182-O) were developed and implemented in LS-Dyna as a user material subroutine (UMAT) for coupled thermo-mechanical finite element analysis (FEA) of warm forming of aluminum alloys. The anisotropy coefficients of the Barlat YLD2000 plane stress yield function for both materials were calculated for the range of temperatures 25 deg. C-260 deg. C. Curve fitting was used to calculate the anisotropy coefficients of YLD2000 and the flow stress as a function of temperature. This temperature-dependent material model was successfully applied to the coupled thermo-mechanical analysis of stretching of aluminum sheets and results were compared with experiments.
- OSTI ID:
- 20726183
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 778; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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